Adjustable foot peg for motorcycle

ABSTRACT

The adjustable foot peg allows a rider to adjust the position of the foot peg in two ways. First, the bracket to which the foot peg attaches preferably includes a series of holes, about which the foot peg apparatus will rotate. Second, the foot peg is placed at the end of a rotating member, the rotating member able to be fixed at one of multiple possible angular positions.

FIELD

This invention relates to the field of motorcycle components and more particularly to an adjustable foot peg.

BACKGROUND

A rider must fit his motorcycle. Only with a proper fit can the rider be assured of maximum performance and safety.

A proper fit requires correctly placed controls. Given that both motorcycles and riders vary in size and shape, the stock motorcycle controls are often in unsatisfactory locations. Stock controls may also lack the range of adjustability required to fit a particular rider.

Foot controls in particular may lack the range, or granularity, of adjustment desired.

The foot controls are a key part of the rider's positioning and control. A rider rests his feet on foot pegs, and actuates toe pegs to operate the shifter and brake. The operation is divided by foot, with the left foot controlling the gear shifter, and the right foot controlling the rear brake.

What is needed is an adjustable foot peg and toe peg that allows a rider to customize the position of each to fit his specific size and preferences.

SUMMARY

The adjustable foot peg allows a rider to modify the position of the foot peg in two ways. First, the bracket to which the foot peg attaches preferably includes a series of holes, about which the foot peg apparatus will rotate. Second, the foot peg is placed at the end of a rotating member, the rotating member able to be fixed at one of multiple possible angular positions.

The mechanical focus of the disclosed device is the operation of the shifting and rear braking of a motorcycle. These functions are handled by a motorcycle's rearset.

A rearset includes: foot pegs; toes pegs; a brake lever for the rear brake; a shift lever; support brackets; and heel guards. Each of the rider's feet interacts with two parts of the rearset: a foot peg, on which the rider rests his heel, midfoot, or forefoot; and a toe peg, which the rider actuates with his forefoot to execute shifts or braking.

The rider chooses to rest his heel, midfoot, or forefoot on the foot peg depending upon his preferred riding position and whether he needs his foot in a position that will reach the toe peg.

Given that the rider rests his foot on the foot peg, the ability to adjust its position is critical, as the position affects the rider all the way up his body.

The position of the rider's foot affects positions of the calf, knee, and thigh. In turn, this affects leg position with respect to the gas tank, and potentially the rider's arms. All of these shifts affect the rider's balance and aerodynamic position.

The disclosed device permits adjustment of the foot peg and toe peg positions, allowing a rider to choose the ideal positions for himself and his motorcycle.

In addition to adjustment of the rider's position, he also interacts with the rearset to control the motorcycle. The toe pegs of the rearsets actuate the rear brake and shifter. During operation of the toe peg, the rider rests the heel of his foot on the foot peg, then moves the toe peg, which in turn moves a lever. When the rider is not operating the toe peg he may shift his foot to the rear. He will then rest the weight of his foot and leg, and potentially that of his entire body, on the foot peg.

On the left side, or shifter side, the rider pushes down on toe peg to downshift, and pull up on toe peg to upshift. The toe peg rotates a shift lever, moving a shift linkage, and actuating the transmission.

On right side, or brake side, the rider pushes down on toe peg to brake. The toe peg rotates a brake lever, moving a brake linkage, and actuating the rear brake.

The disclosed mechanisms use different mechanical means of permitting adjustment of the foot peg and toe peg positions, while fixing the positions in place once chosen.

First, the foot peg. The foot peg is affixed to a pivoting member. Alternatively, the pivoting member includes a protrusion that forms a foot peg.

The pivoting member is rotatable with respect to a mounting point on a bracket, the bracket affixed to the motorcycle.

Given that the rider may rest his weight on the foot peg, the mechanism that maintains its position must be sturdy. To prevent unintended rotation, an adapter plate is optionally placed between the pivoting member and the mounting bracket. The adapter plate acts to fix the rotational position of the arm at certain positions by locking rotation with respect to the pivoting arm, and locking rotation with respect to the mounting bracket.

The angular position of the adapter plate is fixed with respect to the bracket using a rectangular protrusion. The rectangular protrusion of the adapter plate fits within a rectangular pocket of the mounting bracket. The protrusion and pocket need not be rectangular, but can be other shapes that prevent relative rotation. For example, a matched set of triangular shapes, ovals, or hexagons.

The benefit of using a rectangular or square protrusion is that, if only smaller in one dimension, the protrusion can slide within an oversized rectangular pocket. This allows the adapter plate to retain its anti-rotation ability while permitting adjustability of the lateral position.

The illustrated embodiment uses a projection that is wider left-to-right than the pocket, allowing sliding between multiple mounting positions. To change position, the fastener that passes through the pivoting member is removed, the adapter plate slid, and then the fastener reinstalled at a chosen position.

On the opposite side of the adapter plate, the angular position is fixed with respect to the pivoting member using interlocking tabs. Tabs that protrude from the pivoting member sit within the spaces between the corresponding tabs of the adapter plate. A force on the foot peg attempts to cause rotation, which is held against by the tabs resting against one-another.

Preferably the tabs are positioned every 45 degrees. Thus, the tabs on one surface are set at 45 degree increments, and offset by 22.5 degrees on the corresponding surface. For example, on the adapter plate, tabs at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; and on the pivoting member, tabs at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees. The width of each tab fills 22.5 degrees, with a subtraction for tolerance to create a clearance fit between the parts.

Ideally the angular positions mirror across a vertical line, allowing the same adapter plate to be used on either side of the motorcycle, with matching left/right side pivoting member positions. For example, the tab positions of 0, 45, 90, 135, 180, 225, 270, and 315 degrees, mirror as 0, 45, 90, 135, 180, 225, 270, and 315 degrees.

To change the angular position of the pivoting member, the fastener that passes through the pivoting member is loosened from the adapter plate, the pivoting member rotated, and then the fastener is tightened to maintain the chosen position.

Alternatives exist to interlocking tabs. The adapter plate may include holes that match with pins protruding from the pivoting member. Or tabs protruding from the pivoting member may interface with pockets in the adapter plate. A keyed or splined shaft may be used, or two interlocking splined surfaces.

The toe peg is discussed next. While the toe peg also fixes the position of a rotating member in order to hold a position, the position is fixed using compression. The rider applies a load to the toe peg in order to shift or brake, but he does not rest the weight of his body on the toe peg. Thus, the ability of the toe peg to hold an angular position need not be as robust as that of the foot peg, and instead can be more adjustable.

The toe peg freely rotates on a toe peg axle. The toe peg axle is affixed to the end of a rotating member.

The rotating member includes a projection for insertion into a clamping segment of a brake or shift lever. Prior to clamping, the rotating member can rotate along a plane parallel with the clamping segment. With the rotating member held at the desired angular position, a clamping fastener is tightened. As the clamping fastener is tightened, it brings an upper half and a lower half closer to each other, compressing the projection between.

The clamping segment preferably includes multiple penetrations, thus providing multiple locations for insertion of the protrusion. The result is multiple locations about which the rotating member can pivot.

The protrusion includes an optional circumferential channel to prevent interference with the compression fastener. By including a channel, the protrusion diameter can be increased, the fastener diameter increased, and the spacing reduced, all without creating interference between the compression fastener and the projection.

Given that the projection resists rotation using friction, increasing the compression force increases the frictional force, and increasing the surface area prevents the parts from gouging one another.

Thus, the inclusion of the optional circumferential channel increases the ability of the rotating member to resist changes to its angular position while under compression.

The clamping section includes an optional cut on one or both sides of the compression area. The cut removes material that would otherwise inhibit movement of the upper half toward the lower half, and thus would inhibit compression.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention can be best understood by those having ordinary skill in the art by reference to the following detailed description when considered in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view of the foot peg assembly without fasteners;

FIG. 2 is a collapsed view of the foot peg assembly with fasteners;

FIG. 3 is a close-up of a selection of foot peg parts without fasteners;

FIG. 4 is a rear view of the rotating member;

FIG. 5 is a rear view of the adapter plate;

FIG. 6 is a front view of the foot peg assembly, showing angles of foot peg rotation;

FIG. 7 is a rear view of the foot peg;

FIG. 8 is an exploded view of the toe peg assembly;

FIG. 9 is a collapsed view of the toe peg assembly;

FIG. 10 is a front view of the toe peg assembly, showing angles of toe peg rotation;

FIG. 11 is a close-up view of the toe peg rotating member;

FIG. 12 is a view of a shift/brake lever, with a focus on the clamping end;

FIG. 13 is a view of a left side of an exemplary motorcycle, with the disclosed device operating the shifter; and

FIG. 14 is a view of the right side of an exemplary motorcycle, with disclosed device operating the brake.

DETAILED DESCRIPTION

Reference will now be made in detail to the presently preferred embodiments of the invention, examples of which are illustrated in the accompanying drawings. Throughout the following detailed description, the same reference numerals refer to the same elements in all figures.

Referring to FIG. 1, an exploded view of the foot peg assembly without fasteners is shown.

The rearset with adjustable foot peg 1 is formed primarily from the foot peg assembly 10. Foot peg assembly 10 includes the foot peg 12, which slides over the pivoting member projection 42 of the pivoting member 40.

The pivoting member 40 includes multiple pivoting member tabs 50, which interface with adapter plate tabs 62 of the adapter plate 60. The adapter plate rectangular projection 68 fits within the rotation-locking pocket 76 of the mounting bracket 70.

Foot peg assembly 10 further includes the foot peg 12, with foot peg anti-rotation projections 14 that fit into the pivoting member anti-rotation recess 46 of the pivoting member 40.

Referring to FIG. 2, a collapsed view of the foot peg assembly with fasteners is shown.

Pivoting member fastener 54 passes through the pivoting member 40, adapter plate 60, and mounting bracket 70. The mounting bracket 70 includes threaded positioning holes 78 (see FIG. 1) to interface with pivoting member fastener 54, or may use a threaded nut against its opposite face.

Foot peg fastener 18 affixes the foot peg 12 to the pivoting member 40 by threading into the internal projection threads 44 (see FIG. 1) of pivoting member projection 42.

The foot peg 12 includes foot peg fastener bore 20 for a foot peg fastener 18 that is covered by an optional foot peg cap (not shown).

Referring to FIG. 3, a close-up of a selection of parts without fasteners is shown.

The foot peg 12 (see FIG. 2) slides over the pivoting member projection 42 of pivoting member 40. The foot peg fastener 18 (see FIG. 2) interfaces with the internal projection threads 44 of the pivoting member 40 at ℄1.

One or more foot peg anti-rotation projections 14 (see FIG. 7) interface with one or more pivoting member anti-rotation recesses 46. The foot peg resting face 28 (see FIG. 7) is ideally in contact with the pivoting member resting face 45.

When installed, the pivoting member bore 49 lines up with adapter plate bore 64, which in turn lines up with the selected positioning hole 78 of the mounting bracket 70. All members rotate about ℄2, which lines up with the selected positioning hole 78.

An optional countersink 48 allows the pivoting member fastener 54 (see FIG. 2) to recess within the pivoting member. The pivoting member fastener 54 (see FIG. 2) passes through the pivoting member 40 and adapter plate 60, then either threads into the positioning holes 78 of the mounting bracket 70, or passes through to a nut behind the mounting bracket 70.

The pivoting member tabs 50 fit in the spaces between the adapter plate tabs 62, fixing the chosen angular position. The pivoting member tabs are shown placed at 45-degree increments, but any angular separation is anticipated.

The position indicator 52 reveals the appropriate adapter plate position marking 66, allowing the rider to match angular position across sides of the motorcycle, as well as set specific desired positions.

The adapter plate 60 includes one face with adapter plate tabs 62, and an opposing face with an adapter plate rectangular projection 68. The adapter plate rectangular projection 68 fits within the rotation-locking pocket 76 of the mounting bracket 70.

Referring to FIG. 4, a rear view of the rotating member is shown.

The pivoting member projections 42 are offset from each other by a pivoting member step angle 56.

Referring to FIG. 5, a rear view of the adapter plate is shown.

The adapter plate rectangular projection 68 is shown protruding from the adapter plate 60. Optional rounded corners ease repositioning the projection 68 within the rotation-locking pocket 76 of the mounting bracket 70.

Referring to FIG. 6, a front view of the foot peg assembly, showing angles of foot peg rotation is shown.

The pivoting member 40 can be rotated to any position that is a multiple of the pivoting member step angle 56. Here, the pivoting member step angle 56 is 45°, and thus the positions of the pivoting member 40 are 0°, 45°, 90°, 135°, 180°, 225°, 270°.

The adapter plate 60 is shown affixed to the leftmost positioning hole 78 (see FIG. 1) within the rotation-locking pocket 76. If the adapter plate 60 was in the rightmost positioning hole 78, a new set of eight angular positions would be available for the adapter plate 60.

Referring to FIG. 7, a rear view of the foot peg is shown.

The foot peg 12 optionally includes one or more foot peg anti-rotation projections 14 that interface with the pivoting member to prevent rotation of the foot peg 12. Optional knurling 16 helps to maintain the rider's foot position during use.

A foot peg load-bearing recess 26 slides over the pivoting member projection 42 (see FIG. 3), helping to carry the weight of the rider from the foot peg 12 toward the mounting bracket 70 (see FIG. 2), and ultimately the motorcycle.

The foot peg resting face 28 contacts the pivoting member resting face 45 (see FIG. 3) of the pivoting member 40 (see FIG. 3).

Referring to FIG. 8, an exploded view of the toe peg assembly is shown.

The rearset with adjustable toe peg 2 includes actuation lever 130 and toe peg assembly 100. The toe peg assembly 100 includes a toe peg 102 with a toe peg bore 104. The toe peg 102 is preferably formed of a flexible material, such as rubber. When formed from a flexible material, the toe peg 102 is installed by stretching over the toe peg axle 106. If formed from a stiffer material, the toe peg 102 may be formed of multiple pieces that are assembled over the toe peg axle 106, or the toe peg axle 106 may be formed from multiple parts and assembled after installation of the toe peg 102.

The toe peg axle 106 interfaces with toe peg rotating member 112, held in place by toe peg fastener 116 that passes through rotating member bore 118, then threaded into toe peg axle bore 108.

An optional toe peg axle protruding face 110 fits within a toe peg recessed face 114.

The toe peg rotating member 112 includes a rotating member projection 120 with optional projection screw channel 122.

The rotating member projection 120 is inserted into the first penetration 136 or second penetration 137 of the clamping segment 132, which in turn is part of the actuation lever 130. A compression fastener 142 inserted at compression fastener penetration 143 is used to create a clamping force, squeezing the clamping segment 132 around the rotation member projection 120, thereby maintaining the angular position of the toe peg rotating member 112.

When in use, the actuation lever 130 rotates about a pivot point 150, which changes the position of the linkage connection 154. The linkage connection 154 in turn actuates the shift mechanism or rear brake of the motorcycle (not shown).

Referring to FIG. 9, a collapsed view of foot peg assembly is shown.

The toe peg rotating member 112 is shown inserted into first penetration 136. Compression fastener 142 is inserted, squeezing the clamping segment 132 about the rotating member projection 120, holding the toe peg in place.

Referring to FIG. 10, a front view of the toe peg assembly, showing angles of toe peg rotation is shown.

The toe peg rotating member 112 is held at any angle desired by the rider with respect to the actuation lever 130. Moving the rotating member projection from the first penetration 136 to the second penetration 137 results in another circle of potential toe peg placement positions.

Referring to FIG. 11, a close-up view of the toe peg rotating member is shown.

The toe peg recessed face 114 of the toe peg rotating member 112 is visible, as is a portion of the projection screw channel 122 of the rotating member projection 120.

Referring to FIG. 12, a view of a shift/brake lever, with a focus on the clamping end, is shown.

The actuation lever 130 includes a clamping segment 132 that interfaces with the rotating member projection 120 (see FIG. 11) of the toe peg rotating member 112. The clamping segment 132 is divided into a clamp upper half 138 and clamp lower half 140. An optional cut 134 further divides the clamping halves 138/140 to ensure material does not impede clamping.

This embodiment is shown with a first penetration 136 and a second penetration 137, although any number of penetrations is permissible.

The compression fastener 142 (see FIG. 9) sits within an optional compression fastener countersink 144.

In contrast to an earlier embodiment of the actuation lever 130, this embodiment includes a pivot point 150 on an end opposite the clamping segment 132, with the linkage connection 154 between the ends.

Referring to FIG. 13, a view of a left side of an exemplary motorcycle facing to the left, with the disclosed device operating the shifter is shown.

The shift heel-guard 200 is shown attached to the rearset with adjustable foot peg 1, in turn shown in connection with the rearset with adjustable toe peg 2.

Referring to FIG. 14, a view of the right side of an exemplary motorcycle facing to the right, with disclosed device operating the brake is shown.

The brake heel-guard 180 is shown attached to the rearset with adjustable foot peg 1, in turn shown in connection with the rearset with adjustable toe peg 2.

Equivalent elements can be substituted for the ones set forth above such that they perform in substantially the same manner in substantially the same way for achieving substantially the same results.

It is believed that the system and method as described and many of its attendant advantages will be understood by the foregoing description. It is also believed that it will be apparent that various changes may be made in the form, construction, and arrangement of the components thereof without departing from the scope and spirit of the invention or without sacrificing all of its material advantages. The form herein before described being merely exemplary and explanatory embodiment thereof. It is the intention of the following claims to encompass and include such changes. 

What is claimed is:
 1. A motorcycle foot peg assembly for mounting to a mounting bracket, the motorcycle foot peg assembly comprised of: a foot peg; a pivoting member having a first end and a second end; the first end affixed to the foot peg; the second end interfacing with a mounting bracket; the first end rotating about the second end; an angular position created between the pivoting member and the mounting bracket; the angular position having two or more indexed locations at which the pivoting member can be fixed; whereby the rotation of the pivoting member alters the position of the foot peg with respect to the mounting bracket, allowing the foot peg to be placed at one of multiple positions.
 2. The motorcycle foot peg assembly of claim 1, further comprising: an adapter plate between the pivoting member and the mounting bracket; the adapter plate fixing the rotational position of the pivoting member with respect to the mounting bracket.
 3. The motorcycle foot peg assembly of claim 2, wherein: the mounting bracket includes a rotation-locking pocket; the second end of the pivoting member includes one or more pivoting member tabs; the adapter plate includes a first side and a second side; the first side faces the pivoting member, and the first side includes one or more adapter plate tabs that interface with the one or more pivoting member tabs; the second side faces the mounting bracket, and the second side includes a locking protrusion that fits within the rotation-locking pocket of the mounting bracket.
 4. The motorcycle foot peg assembly of claim 1, wherein the pivoting member includes a protrusion that fits within the foot peg; the protrusion stiffening the connection between the pivoting member and the foot peg.
 5. The motorcycle foot peg assembly of claim 3, wherein: the one or more pivoting member tabs are placed at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; the one or more adapter plate tabs are placed at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees; whereby the pivoting member tabs fit between the adapter plate tabs, thus locking the angular position of the pivoting member with respect to the adapter plate.
 6. The motorcycle foot peg assembly of claim 1, further comprising: an adapter plate that interfaces with the mounting bracket and the second end of the pivoting member; the adapter plate includes a first side with adapter plate tabs; the second end of the pivoting member includes one or more pivoting member tabs at placed at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; the one or more adapter plate tabs placed at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees; whereby the pivoting member tabs and adapter plate tabs act to fix the angular position of the pivoting member with respect to the adapter plate.
 7. The motorcycle foot peg assembly of claim 2, wherein the adapter plate further comprises: a second side with a locking protrusion, the protrusion having a first shape; the locking protrusion fitting within a pocket of the mounting bracket, the pocket having a second shape; the first shape of the locking protrusion fitting within the second shape of the pocket, the first shape unable to rotate within the second shape.
 8. An motorcycle foot peg assembly comprising: a pivoting member having a first end and a second end; an adjustable foot peg affixed to the first end of the pivoting member; the second end of the pivoting member rotating about a positioning hole; an angular position of the pivoting member able to be fixed at two or more positions.
 9. The motorcycle foot peg assembly of claim 8, further comprising: a mounting bracket for attachment to a motorcycle; the pivoting member rotating with respect to the mounting bracket; an adapter plate between the pivoting member and the mounting bracket; the adapter plate fixing the rotational position of the pivoting member with respect to the mounting bracket.
 10. The motorcycle foot peg assembly of claim 9, wherein: the mounting bracket includes a rotation-locking pocket; the second end of the pivoting member includes one or more pivoting member tabs; the adapter plate includes a first side and a second side; the first side faces the pivoting member, and the first side includes one or more adapter plate tabs that interface with the one or more pivoting member tabs; the second side faces the mounting bracket, and the second side includes a locking protrusion that fits within the rotation-locking pocket of the mounting bracket.
 11. The motorcycle foot peg assembly of claim 8, further comprising: a foot peg; the pivoting member including a protrusion that fits within the foot peg; the protrusion stiffening the connection between the pivoting member and the foot peg.
 12. The motorcycle foot peg assembly of claim 10, wherein: the one or more pivoting member tabs are placed at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; the one or more adapter plate tabs are placed at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees; whereby the pivoting member tabs fit between the adapter plate tabs, thus locking the angular position of the pivoting member with respect to the adapter plate, and the adapter plate is locked with respect to the mounting bracket by the locking protrusion, resulting in the angular position of the pivoting member being locked with respect to a motorcycle.
 13. The motorcycle foot peg assembly of claim 8, further comprising: an adapter plate that interfaces with a mounting bracket and the second end of the pivoting member; the adapter plate including a first side with adapter plate tabs; the second end of the pivoting member including one or more pivoting member tabs at placed at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; the one or more adapter plate tabs placed at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees; whereby the pivoting member tabs and adapter plate tabs act to fix the angular position of the pivoting member with respect to the adapter plate.
 14. The motorcycle foot peg assembly of claim 9, wherein the adapter plate further comprises: a second side with a locking protrusion, the locking protrusion having a first shape; the locking protrusion fitting within a pocket of the mounting bracket, the pocket having a second shape; the first shape of the locking protrusion fitting within the second shape of the pocket, the first shape unable to rotate within the second shape of the pocket.
 15. An adjustable motorcycle foot peg with fixed angular positions about a centerpoint of rotation, the adjustable motorcycle foot peg comprised of: a pivoting member; a mounting bracket with one or more positioning holes; an adapter plate placed between the pivoting member and the mounting bracket, the adapter plate acting to fix the rotational position of the pivoting member with respect to the mounting bracket.
 16. The adjustable motorcycle foot peg of claim 15, wherein: the mounting bracket includes a rotation-locking pocket; the pivoting member includes a first end and a second end; the first end affixed to the adjustable motorcycle foot peg; the second end interfacing with the mounting bracket; the second end of the pivoting member includes one or more pivoting member tabs; the adapter plate includes a first side and a second side; the first side faces the pivoting member, and the first side includes one or more adapter plate tabs that interface with the one or more pivoting member tabs; the second side faces the mounting bracket, and the second side includes a locking protrusion that fits within the rotation-locking pocket of the mounting bracket.
 17. The adjustable motorcycle foot peg of claim 15, wherein the pivoting member includes a protrusion that fits within the foot peg; the protrusion stiffening the connection between the pivoting member and the foot peg.
 18. The adjustable motorcycle foot peg of claim 16, wherein: the one or more pivoting member tabs are placed at angles of 0, 45, 90, 135, 180, 225, 270, and 315 degrees; the one or more adapter plate tabs are placed at angles of 22.5, 67.5, 112.5, 157.5, 202.5, 247.5, 292.5, and 337.5 degrees; whereby the pivoting member tabs fit between the adapter plate tabs, thus locking the angular position of the pivoting member with respect to the adapter plate, and the adapter plate with respect to the mounting bracket.
 19. The adjustable motorcycle foot peg of claim 16, wherein: the locking protrusion has a first shape; the locking protrusion fits within a rotation-locking pocket of the mounting bracket, the rotation-locking pocket having a second shape; the first shape of the locking protrusion fits within the second shape of the rotation-locking pocket, the first shape unable to rotate within the second shape of the rotation-locking pocket. 